Hi everybody, I have a problem using zaphfc. When I start asterisk after 8-10 seconds I get the message "Primary D-Channel on span 1 down" and my isdn modem stops to work. If I place or receive a call before this message all works really fine (even if the call is very long), but when I hang up, after a few seconds I get the message and the modem crashes. Stopping and restarting asterisk solves the problem for another 8-10 seconds :-( Thank you for any suggestions.... maxx